Heat-exchanger with a bundle of parallelly extending pipes adapted to be acted upon by air

Abstract

A heat-exchanger with a bundle of parallelly extending pipes adapted to be acted upon by air which are constructed in the manner of heat pipes; a connection box extends transversely to the pipe bundle which surrounds section-wise the heat pipe hollow spaces of the pipe bundle and which is adapted to be traversed by a heat carrier medium; the connection box essentially consists of an extruded profile whose profile direction is disposed parallel to the pipe rows of the bundle and is provided at its end faces with guide covers which take over the distribution and deflection of the heat carrier medium toward the channels inside of the extruded profile.

We claim: 
     
       1. A heat-exchanger comprising a bundle of substantially parallelly extending metal pipe means adapted to be acted upon by air, which are arranged in at least one row, said pipe means being hermetically sealed and constructed in the manner of heat-pipe means forming heat-pipe hollow spaces, at least one metallic connection box means extending transversely to the pipe bundle and surrounding section-wise the heat-pipe hollow spaces of the pipe bundle, said connection box means being adapted to be traversed by a heat carrier medium and being sealed off with respect to the heat pipe hollow spaces of the pipe bundle but being in heat-transferring connection with said heat pipe hollow spaces, characterized in that (a) the connection box means is formed essentially of an extruded profile means whose profile direction is disposed substantially parallel to the at least one pipe row;   (b) a longitudinally extending slot-like heat pipe channel means being provided in the extruded profile means within the area of each pipe row, said slot-like heat pipe channel means being closed over the entire circumference and at the end faces thereof and being open exclusively toward the individual pipe means of the corresponding pipe row;   (c) longitudinally extending heat carrier channel means open at the end faces of the extruded profile means being provided inside of the extruded profile means on both sides of each heat pipe channel means; and   (d) guide cover means sealingly secured at both end faces of the extruded profile means which operatively connect adjacent heat carrier channel means into a channel system adapted to be traversed uniformly by a respective medium.   
     
     
       2. A heat-exchanger according to claim 1, characterized in that distribution and collecting channel means are provided in said guide cover means. 
     
     
       3. A heat-exchanger according to claim 1 or 2, characterized in that U-shaped deflection channel means are provided in the guide cover means. 
     
     
       4. A heat-exchanger according to claim 1, characterized in that the guide cover means connect adjacent heat carrier channel means into a uniform channel system. 
     
     
       5. A heat-exchanger according to claim 1, characterized in that the heat pipe hollow spaces between two adjacent pipe rows respectively heat pipe channel means are completely separated from one another form a flow point of view. 
     
     
       6. A heat-exchanger according to claim 5, characterized in that the pipe rows are disposed substantially transversely to the air stream. 
     
     
       7. A heat-exchanger according to claim 6, characterized in that a bead means which is broader than the pipe outside diameter is formed-on at the extruded profile means on the outside thereof facing the pipe bundle along the course of the pipe rows, said bead means being provided with a bore at the fastening location of each pipe means, said bore extending up to the heat pipe channel means, and the respective pipe end being sealingly secured in a corresponding bore. 
     
     
       8. A heat-exchanger according to claim 7, characterized in that the end faces of the heat pipe channel means are closed off with respect to the guide cover means by separate cover elements. 
     
     
       9. A heat-exchanger according to claim 8, characterized in that the guide cover means are brazed onto the extruded profile means. 
     
     
       10. A heat-exchanger according to claim 7, characterized in that continuous cross web means are provided in the heat carrier channel means, the heat carrier channel means being subdivided by said cross web means into several smaller parallelly extending individual channels. 
     
     
       11. A heat-exchanger according to claim 7, characterized in that one of the guide cover means includes on the inlet side a distribution space branching off exclusively into few individual channels, the remaining individual channels of the connection box means being operatively connected by separate U-shaped deflection channel means meander-shaped into a continuous channel system, the deflection channel means being so constructed and arranged in the guide cover means that the individual channels acted upon on the inlet side are separated from each other over the entire course thereof inside of the connection box means and that the individual channels combine only on the outlet side thereof into a collecting space. 
     
     
       12. A heat-exchanger according to claim 11, characterized in that one connection box means each is provided at the two ends of the pipe bundle, one of said connection box means being adapted to be acted upon by a heat carrier medium warmer than the space temperature while the other is adapted to be acted upon with a heat carrier medium tempered colder than the dew point temperature of the surrounding air, and in that the guide cover means of both connection box means are subdivided transversely to the direction of the pipe rows into the two independent sections, each provided with separate feed and discharge connections leading to the outside, in such a manner that only a portion of the pipe rows of the pipe bundle is adapted to be acted upon by itself from one of the connection box means isolated from the other pipe rows. 
     
     
       13. A heat-exchanger according to claim 12, characterized in that said sections are of substantially the same size. 
     
     
       14. A heat-exchanger according to claim 1, characterized in that a bead means which is broader than the pipe outside diameter is formed-on at the extruded profile means on the outside thereof facing the pipe bundle along the course of the pipe rows, said bead means being provided with a bore at the fastening location of each pipe, said bore extending up to the heat pipe channel means, and the respective pipe end being sealingly secured in a corresponding bore. 
     
     
       15. A heat-exchanger according to claim 1, characterized in that the end faces of the heat pipe channel means are closed off with respect to the guide cover means by separate cover elements. 
     
     
       16. A heat-exchanger according to claim 1, characterized in that the guide cover means are brazed onto the extruded profile means. 
     
     
       17. A heat-exchanger according to claim 1, characterized in that continuous cross web means are provided in the heat carrier channel means, the heat carrier channel means being subdivided by said cross web means into several smaller parallelly extending individual elements. 
     
     
       18. A heat-exchanger according to claim 1 or 17, characterized in that one of the guide cover means includes on the inlet side a distribution space branching off exclusively into few individual channels, the remaining individual channels of the connection box means being operatively connected by separate U-shaped deflection channel means meander-shaped into a continuous channel system, the deflection channel means being so constructed and arranged in the guide cover means that the individual channels acted upon on the inlet side are separated from each other over the entire course thereof inside of the connection box means and that the individual channels combine only on the outlet side thereof into a collecting space. 
     
     
       19. A heat-exchanger according to claim 18, characterized in that continuous cross web means are provided in the heat carrier channel means, the heat carrier channel means being subdivided by said cross web means into several smaller parallelly extending individual channels. 
     
     
       20. A heat-exchanger according to claim 1, characterized in that one connection box means each is provided at the two ends of the pipe bundle, one of said connection box means being adapted to be acted upon by a heat carrier medium warmer than the space temperature while the other is adapted to be acted upon with a heat carrier medium tempered colder than the dew point temperature of the surrounding air, and in that the guide cover means of both connection box means are subdivided transversely to the direction of the pipe rows into the two independent sections, each provided with separate feed and discharge connections leading to the outside, in such a manner that only a portion of the pipe rows of the pipe bundle is adapted to be acted upon by itself from one of the connection box means isolated from the other pipe rows.